Condensation control system for an ink jet printing system
a control system and ink jet technology, applied in printing, inking apparatus, other printing apparatus, etc., to achieve the effect of reducing resistance and resistance flow
Inactive Publication Date: 2014-06-26
EASTMAN KODAK CO
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Benefits of technology
The patent text describes a system for controlling the condensation of ink droplets as they are ejected from a printing module with multiple inkjet printheads. The system uses a barrier, caps, and an airflow generation system to remove any vaporized carrier fluid between the barrier and the receiver. The airflow is directed through channels to prevent any variations in the travel paths of the ink droplets. The technical effect of this system is to improve the accuracy of printing with inkjet technology.
Problems solved by technology
Differences between a lower resistance to the cross-module airflow in the lower resistance flow channels and a higher resistance to the cross-module airflow in the higher resistance flow areas cause the cross-module airflow to flow through the cross-module airflow channels so that any portion of the cross-module airflow entering the higher resistance flow areas does not create variations in the travel paths of the ink droplets that are sufficient to form an observable artifact in a print made on the receiver using the ink droplets.
Method used
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[0037]FIG. 2 is a side schematic view of a first embodiment of an inkjet printing system 20. Inkjet printing system 20 has an inkjet print engine 22 that delivers one or more inkjet images in registration onto a receiver 24 to form a composite inkjet image. Such a composite inkjet image can be used for any of a plurality of purposes, the most common of which is to provide a printed image with more than one color. For example, in a four color image, four inkjet images are formed, with each inkjet image having one of the four subtractive primary colors, cyan, magenta, yellow, and black. The four color inkjet inks can be combined to form a representative spectrum of colors. Similarly, in a five color image various combinations of any of five differently colored inkjet inks can be combined to form a color print on receiver 24. That is, any of five colors of inkjet ink can be combined with inkjet ink of one or more of the other colors at a particular location on receiver 24 to form a col...
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Condensation control systems are provided for use with inkjet printing systems that use a combination of higher resistance flow areas and lower resistance flow areas to allow a vaporized carrier fluid reducing airflow to flow between a printing module and a receiver during printing without creating observable artifacts in a print. Removal of the vaporized carrier fluid reduces condensation.
Description
FIELD OF INVENTION[0001]The present invention relates to controlling condensation of vaporized liquid components of inkjet inks during inkjet ink printing.BACKGROUND OF THE INVENTION[0002]In an ink jet printer, a print is made by ejecting or jetting a series of small droplets of ink onto a paper to form picture elements (pixels) in an image-wise pattern. The density of a pixel is determined by the amount of ink jetted onto an area. Control of pixel density is generally achieved by controlling the number of droplets of ink jetted into an area of the print. To produce a print containing a single color, for example a black and white print, it is only necessary to jet a single black ink so that more droplets are directed at areas of higher density than areas with lower density.[0003]Color prints are generally made by jetting, in register, inks corresponding to the subtractive primary colors cyan, magenta, yellow, and black. In addition, specialty inks can also be jetted to enhance the c...
Claims
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IPC IPC(8): B41J2/07
CPCB41J2/1714B41J29/12B41J2202/20B41J2/1433B41J2/155B41J29/377
Inventor RIMAI, DONALD SAULHAWRYSCHUK, TIMOTHY JOHNPIATT, MICHAEL JOSEPHTUNMORE, DAVID F.BULATHSINGHALAGE, HARSHA S.VANDAGRIFF, RANDY DAE
Owner EASTMAN KODAK CO